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  +------------------------------------------------------------------------
  |
  |      SOUND INTERFACE DEVICE (SID) 6581
  |
  +------------------------------------------------------------------------
  |
  |  SID related topics:
  |
  |    <A HREF="SIDADR.HTM">ADR-Table</A>
  |    <A HREF="SIDMTH.HTM">SID-Mathmatics</A>
  |
  |  Register description:
  |
  |   <A HREF="SID0.HTM">$D400/54272/SID+0</A>       Voice 1: Frequency Control - Low-Byte
  |   <A HREF="SID1.HTM">$D401/54273/SID+1</A>       Voice 1: Frequency Control - High-Byte
  |   <A HREF="SID2.HTM">$D402/54274/SID+2</A>       Voice 1: Pulse Waveform Width - Low-Byte
  |   <A HREF="SID3.HTM">$D403/54275/SID+3</A>       Voice 1: Pulse Waveform Width - High-Nybble
  |   <A HREF="SID4.HTM">$D404/54276/SID+4</A>       Voice 1: Control Register
  |   <A HREF="SID5.HTM">$D405/54277/SID+5</A>       Voice 1: Attack / Decay Cycle Control
  |   <A HREF="SID6.HTM">$D406/54278/SID+6</A>       Voice 1: Sustain / Release Cycle Control
  |   <A HREF="SID7.HTM">$D407/54279/SID+7</A>       Voice 2: Frequency Control - Low-Byte
  |   <A HREF="SID8.HTM">$D408/54280/SID+8</A>       Voice 2: Frequency Control - High-Byte
  |   <A HREF="SID9.HTM">$D409/54281/SID+9</A>       Voice 2: Pulse Waveform Width - Low-Byte
  |   <A HREF="SID10.HTM">$D40A/54282/SID+10</A>      Voice 2: Pulse Waveform Width - High-Nybble
  |   <A HREF="SID11.HTM">$D40B/54283/SID+11</A>      Voice 2: Control Register
  |   <A HREF="SID12.HTM">$D40C/54284/SID+12</A>      Voice 2: Attack / Decay Cycle Control
  |   <A HREF="SID13.HTM">$D40D/54285/SID+13</A>      Voice 2: Sustain / Release Cycle Control
  |   <A HREF="SID14.HTM">$D40E/54286/SID+14</A>      Voice 3: Frequency Control - Low-Byte
  |   <A HREF="SID15.HTM">$D40F/54287/SID+15</A>      Voice 3: Frequency Control - High-Byte
  |   <A HREF="SID16.HTM">$D410/54288/SID+16</A>      Voice 3: Pulse Waveform Width - Low-Byte
  |   <A HREF="SID17.HTM">$D411/54289/SID+17</A>      Voice 3: Pulse Waveform Width - High-Nybble
  |   <A HREF="SID18.HTM">$D412/54290/SID+18</A>      Voice 3: Control Register
  |   <A HREF="SID19.HTM">$D413/54291/SID+19</A>      Voice 3: Attack / Decay Cycle Control
  |   <A HREF="SID20.HTM">$D414/54292/SID+20</A>      Voice 3: Sustain / Release Cycle Control
  |   <A HREF="SID21.HTM">$D415/54293/SID+21</A>      Filter Cutoff Frequency: Low-Nybble
  |   <A HREF="SID22.HTM">$D416/54294/SID+22</A>      Filter Cutoff Frequency: High-Byte
  |   <A HREF="SID23.HTM">$D417/54295/SID+23</A>      Filter Resonance Control / Voice Input Control
  |   <A HREF="SID24.HTM">$D418/54296/SID+24</A>      Select Filter Mode and Volume
  |   <A HREF="SID25.HTM">$D419/54297/SID+25</A>      Analog/Digital Converter: Game Paddle 1
  |   <A HREF="SID26.HTM">$D41A/54298/SID+26</A>      Analog/Digital Converter: Game Paddle 2
  |   <A HREF="SID27.HTM">$D41B/54299/SID+27</A>      Oscillator 3 Output
  |   <A HREF="SID28.HTM">$D41C/54300/SID+28</A>      Envelope Generator 3 Output
  |
  +------------------------------------------------------------------------

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